Incandescent gas-burner.



No. 67mm.

Patented Apr. 9, |90I.

l pl \/E; 'V El R.;

c. s. PNmKHAm. INCANDESCE'NTGAS BURNER. (Appl e. n m d Aug e i900) No Model.)

NITED STATES PATENT OFFICE9 CHARLES S. PINKHAM, OF BOSTON, MASSACHUSETTS.

INCANDESCENT GAS-BURNER.

SECIFICATION forming part of Letters Patent No. 671,610, dated April 9, 1901. Application filed August 6, 1900. Serial No. 26,075. (No model.)

To tl/f whom zt may concern,.-

Be it known that I, CHARLES S. PINKHAM, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Incandescent Gas-Burners, of which the following is a specitication.

My invention has for its object to improve the construction of the' incandescent gasbnrner for which Letters Patent of the United States No. 617,044'Were issued to me .Iannary 3, 1899. In my said burner the mixture of and air which rst enters the mixingchamber above the top of the Bunsen or main tube and is brought into contact with the auxiliary jet contains too large a proportion of air and when ignited is liable to produce an explosion which will extinguish the said auxiliary jet without lighting the burner. To overcome this difliculty is the object of my invention, which consists'in admitting gas to the mixing-chamber located above the top of the main tube previous to the admission of gas to the base of said tube, said mixingchamber being thus supplied with pure gas, with which is subsequently mixed the gas and air rising through the Bunsen tube, a com pound suiiciently enriched with pure gas being thus formed which will ignite from the auxiliary jet without explosion, thus preventing the extinguishing of the said auxiliary jet and insuring the lighting of the burner.

My invention also consists in certain novel features of construction and combinations of parts, as will be hereinafter fully set forth and specifically claimed.

In the accompanying drawings, Figure lis a central vertical section of an incandescent gas-burner constructed in accordance with. my invention. Figs. 2, 3, and 4 are elevations of a portion of the same, showing the plug of the gas-cock in diierent positions. Fig. 5 is a horizontal section on the line 5 5 of Fig. l. Fig. 6 is a plan of the bottom of the burner. Fig. 7 is a horizontal section on the line 7 7 of Fig. l.

In the said drawings, A represents/the shell of the stop-cock of the burner, to which is secured a vertical Bunsen tube B, provided near its bottom with inlet-openings b for the admission of the air necessary for combustion. Over the Bunsen tube B is tightly fitted a removable sleeve O, the upper end of which is enlarged to form a chamber 10, the top of which is covered, as usual, by a wire screen (Z. The lower end of the sleeve C is enlarged, forming a deector a for directing the aircurrents into the openings b.

D is the tapering plug of the gas-cock, which is arranged vertically within the shell A, on one side of which is the gasssupply pipe e. At the bottom of the plug D is a short stem f, to which is secured by apin g ashort sleeve 7L, withn the lower portion of which is firmly secured by solder or otherwise the stem or handle E, which may be of -any suitable length. The plug D is held up securely in place within its seat in the shell A by means of a washer or collar 7c, which encircles the sleeve h and tits up snugly against the shoulder l2 of the plug, as shown in Fig. l, the screws m m, by which the collar 7c is secured tothe shell A, serving also as stops for the pin g, Fig. 6, projecting from the plug D, to limit its movement in either direction when turned to admit the gas to the burner or shut it off therefrom. Within the upper end ot' the plug D is formed a chamber l5, communicaing with a smaller chamber 16 at the top of the shell A, the latter communicating through holes 18 in the top of the chamber lo with the interior of the tube B. The gas enters the chamber l5 through the inlet-passage 19, Fig. 5, in the plug D and thence passes up through the holes 1S into the main tube B, where it is mixed with the air entering at the inlet-openings Z).

From the top of the tube B rise three bars 2l, to the upper ends of which is secureda ring 22, within which is placed a ring 23,0t`in- Sulating material,through which passes a wire n, forming the fixed electrode of the electric lighting device, said wire extending down beneath the ring 23, where it is formed into a loop, to which is connected a wire 24:, passing down within the chamber l0 and out through an insulating-bushing 25, outside of which it is connected with the battery-wire. By thus detachably connecting the wire 24 with the electrode n the burner may be'conveniently taken apart without cutting the wire, as would otherwise be necessary.

Secured to the center of the plug is an auxiliary burner G, consisting of a tube of small IOO diameter which extends up Within the tube B and nearly to the top of the chamber and communicates at its bottom with an independent gas-inlet passage 30, formed in the plug D, beneath and one side of the passage 19, through which the gas is supplied to the tube B. This auxiliary burner G, which is chamber 10 the auxiliary burner G is pro' vided with one or more outlet-apertures 32, through which the gas escapes into said chamber 1Q at the same time that it does from the orifice 31 at its tip, pure gas being vthus admitted to the chamber 10 near its base for a purpose to be presently explained. g

As the plug D is first turned bymeans of the handle E, the passage is brought into communication with the supply-pipe e, as

shown in Fig. 2, when the gas Will` at once pass to the tip of t-he auxiliary burner G and be ignited at that point by the spark produced by the separation of the electrodes as i the gas-cock is turned, the iiame issuing from the tip of the said auxiliary burner passing up through the screen d, the gas also at the same time issuing, as beforel described, from the apertures 32 into the chamber 10. As the plug continues t-o be turned the passage 19 is brought into communication with the supplypipe e, as shown in Fig. 3, and the gas then passes up into the chambers 15 16 and through the holes 18 into the main burner or Bunsen tube B, Where it is mixed With airventering through the openings b, after which it passes up into the chamber 10, there mixing With the pure gas which has previously escaped from the apertures 32 of the auxiliary burner. The compound thus enriched With pure gas then passes through the screen d, above which it is ignited by the Iiame from thel auxiliary burner without producing any explosion and Without extinguishing the auxiliary jet, thus insuring the proper lighting of the burner. As soon as the main body of gas has'been thus ignited the further turning of the plug D to the limit of its movement-Will cause the passage 30 to be carried out of line with the supply-pipe e and closed, as shown in Fig. 4, thus extinguishing the auxiliary burner and leaving the passage 19, by Which the main burner is supplied with gas, Wide open, as required.

Although I prefer to light the gas in my improved burner by means of an electricspark-producing device, as described, I do not Wish to confine myself to such method, as the gas issuing from the said auxiliary burner may be ignited by means of a match or torch and the immunity from explosion by reason of admitting pure gas into the chamber 10 immediately above the top of the tube D still retained.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. In an incandescent gas-burner, the combination With a mixing chamber located above the top of the main or Bunsen tube and provided at its top with a screen, and a gas-` y of the gas-cock through which the'gas is admitted in advance of its entrance into the base of the main tube, substantially as described.

2. In an incandescent gas-burner, the combination with a mixing chamber located above the top of the main or Bunsen tube, said chamber being provided at its top with a screen, and a gas-cock having a passage for admitting gas to said main tube at its base, of an auxiliary burner located Within said mixing-chamber and having in addition to the orifice at its tip Van outlet for the escapeof the gas into'said mixing-chamber, said auxiliary burner communicating with the supply-pipe through an independent passage in the plug of the gas-cock through which gas isadmitted in advance of its entrance into the bottom of the main tube, substantially as' described.

Witness my hand this 4th day of August, A. D. 1900.

CHARLES S. PINKHAM. In presence of- Y P. E. TESCHEMACHER, LILLIAN I. BAsFoRD.

IOO 

